CHAPTER 9 MAKE UP HOMEWORK

CHAPTER 9 MAKE UP HOMEWORK - Highest bond energy? Shortest...

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CHAPTER 9 MAKE UP HOMEWORK 1. Which of the following types of hybrid orbitals allows for the formation of at least one π bond? sp 3 , sp 2 , dsp 3 , sp, d 2 sp 3 2. What it the hybridization on all of the atoms in the amino acid aspartic acid, shown here: C C C C O O H N H H H H H O O H 3. Use molecular orbital theory to predict whether or not each of the following molecules or ions should exist in a relatively stable form. C 2 2+ Li 2 Be 2 2+ Li 2 2- 4. For each of the following compounds, draw an appropriate Lewis structure, determine the geometry using VSEPR, determine whether the molecule is polar, and identify the hybridization of all the atoms. COF 2 (carbon is the central atom) S 2 Cl 2 (Cl-S-S-Cl) SF 4 5. The genetic code is based on four different bases with the structures shown below. Assign a geometry and hybridization to each of the carbons and nitrogens in these four bases. a. cytosine: N C C NH C H C H NH 2 O b. adenine: C C C N N CH NH C H N NH 2 c. thymine: C C H C NH NH C O O C H 3 d. guanine: C C C N NH C NH C H N NH 2 O
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6. According to molecular orbital theory, which of the following ions has the highest bond order?
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Unformatted text preview: Highest bond energy? Shortest bond length? O 2 , O 2-, O 2 2-7. The structure for caffeine, present in coffee and many soft drinks, is shown below. How many bonds are present in caffeine? How many bonds? Insert the lone pairs in the molecules. What kind of orbitals to the lone pairs occupy? C C C N N C N CH N O O CH 3 C H 3 CH 3 8. The structure for acetylsalicylic acid (aspirin) is shown below. How many bonds are present in aspirin? How many bonds? C CH C CH C H C H C OH O O C O CH 3 9. Draw Lewis structures and MO diagrams for CN + , CN, and CN-. According to the Lewis structures, which species is most stable? According to MO theory, which species is most stable? Do the two theories agree? 10. The species NO 2 + , and NO 2-, in which N is the central atom, have very different bond angles. Predict what these bond angles might be. What would you predict for NO 2 ?...
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CHAPTER 9 MAKE UP HOMEWORK - Highest bond energy? Shortest...

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